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The M1A1 Thompson submachine gun on display at the Virginia War Museum. The M1A1, standardized in October 1942 as the United States Submachine Gun, Cal. .45, M1A1, could be produced in half the time of the M1928A1, and at a much lower cost. The main difference between the M1 and M1A1 was the bolt.
Any real advantages to the system were far outweighed by the additional cost of manufacture associated with the device. Also, in the Thompson submachine gun the H-shaped bronze lock connects the bolt actuator to the bolt body; incorrect installation of the Blish lock can render a Thompson inoperable upon firing.
In the later 1920s, there was some limited progress: around 1926, Cutts compensator became an option in the Thompson SMG (R. M. Cutts' earliest patent is from 1925 [7]), in 1927 Škoda patented [8] a family of muzzle brake designs, one of which was used on 8 cm kanon vz. 28, and in 1928, Schneider et Cie (which was allied with Škoda at the ...
Auto-Ordnance Corporation was created by John T. Thompson in August 1916 with the backing of investor Thomas Ryan. In 1915 Thompson had found the Blish Lock patent of Commander John Blish, which was the operating principle of the first prototypes of the Thompson submachine gun and the Thompson Autorifle. In exchange for shares of the newly ...
Thompson studied several designs and was impressed with a delayed-blowback breech system designed by John Blish, a commander in the United States Navy. With Blish as a partner, Thompson obtained the necessary venture capital to form the Auto-Ordnance Company, and began working on the design of what eventually became the Thompson submachine gun. [4]
The overall weapon was based on the Thompson Submachine Gun, which Hyde drew inspiration from in many of his weapon designs. An original .30 Carbine based on the M1921/27 variants worked well. However, due to the rising production during World War II , the initial design was too expensive for mass production, and its weight defied the concept ...
DUX submachine gun: Oviedo Military Arsenal 9×19mm Parabellum Spain: 1953 SMG EDDA submachine gun: Only one prototype made .22 Winchester Magnum Rimfire Argentina: 1970s SMG EMP 44: Erma Werke: 9×19mm Parabellum Germany: 1944 SMG Erma EMP: Erma Werke: 9×19mm Parabellum 9×23mm Largo 7.63×25mm Mauser Germany: 1931 SMG ETVS submachine gun
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